3ead3ad52f
Turn the Link class into a template abstracting over the link's argument and return types, but provide default template arguments that keep the generic, unsafe "void* in, sal_IntPtr out" behvior. That way, individual uses of the Link class can be updated over time. All the related macros are duplicated with ..._TYPED counterparts, that additionally take the RetType (except for LINK_TYPED, which manages to infer the relevant types from the supplied Member). (It would have been attractive to change the "untyped" LinkStubs from taking a void* to a properly typed ArgType parameter, too, but that would cause -fsanitize=function to flag uses of "untyped" Link::Call.) Change-Id: I3b0140378bad99abbf240140ebb4a46a05d2d2f8
88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <dbaccess/AsynchronousLink.hxx>
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#include <vcl/svapp.hxx>
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#include <tools/debug.hxx>
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// OAsynchronousLink
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using namespace dbaui;
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OAsynchronousLink::OAsynchronousLink( const Link<>& _rHandler )
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:m_aHandler(_rHandler)
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,m_aEventSafety()
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,m_aDestructionSafety()
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,m_nEventId(0)
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{
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}
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OAsynchronousLink::~OAsynchronousLink()
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{
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{
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::osl::MutexGuard aEventGuard( m_aEventSafety );
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if ( m_nEventId )
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Application::RemoveUserEvent(m_nEventId);
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m_nEventId = 0;
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}
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{
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::osl::MutexGuard aDestructionGuard( m_aDestructionSafety );
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// this is just for the case we're deleted while another thread just handled the event :
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// if this other thread called our link while we were deleting the event here, the
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// link handler blocked. With leaving the above block it continued, but now we are prevented
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// to leave this destructor 'til the link handler recognizes that nEvent == 0 and leaves.
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}
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}
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void OAsynchronousLink::Call( void* _pArgument )
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{
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::osl::MutexGuard aEventGuard( m_aEventSafety );
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if (m_nEventId)
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Application::RemoveUserEvent(m_nEventId);
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m_nEventId = Application::PostUserEvent( LINK( this, OAsynchronousLink, OnAsyncCall ), _pArgument );
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}
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void OAsynchronousLink::CancelCall()
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{
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::osl::MutexGuard aEventGuard( m_aEventSafety );
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if ( m_nEventId )
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Application::RemoveUserEvent( m_nEventId );
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m_nEventId = 0;
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}
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IMPL_LINK(OAsynchronousLink, OnAsyncCall, void*, _pArg)
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{
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{
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::osl::MutexGuard aDestructionGuard( m_aDestructionSafety );
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{
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::osl::MutexGuard aEventGuard( m_aEventSafety );
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if (!m_nEventId)
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// our destructor deleted the event just while we are waiting for m_aEventSafety
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// -> get outta here
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return 0;
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m_nEventId = 0;
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}
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}
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if (m_aHandler.IsSet())
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return m_aHandler.Call(_pArg);
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return 0L;
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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